Holding or stripping mechanism for shearing machines



, 1940.` s. H; s'roNE June 11 `HOLDING on `STRIPPING `MECHANISM For:`SHEARING MACHINES` Filed Nov. 2o, 1939 2 sheets-sheet 1 TO CLUTCH CYL.

` 335` sure` operatedmeans for ope Patented `.lune 11, 194i) PATENTNori-"ici:

HOLDING on sraIPPING; MECHANISM `Iron SHEARING MACHINES l .o I Stanley`H. Stone,"`Bu`flalo,"N. YQ, assignor to Buil'alo Forge CompanLBuil'alo,N. Y.

" f Application November zo, lssasenaiNo. 305,219`

` 12 claims. form-[521 This invention relates to improvements in hold-`down or` stripping mechanisms iorshearingfma- `chines and the like.

t One of the `objects of this `invention isto pro- 5" vide a mechanismof this kind `of improved construction for moving `the stripping memberinto engagement with the workr VAnotherobject isto provide a mechanismof this kind provided with positively `acting means for movinglthestripper l into engagement with the work. and continuously actingresilient means `for moving thestripper out ofl engagement with thework. A 4further Objectis to provide improved `mechanism of this kind of"simplified construction for 4adjusting the `15 stripper so as tolcooperate with `work of diifert ent dimensions.` Other objects willappear from` the following description and claims,

Inthe accompanying drawingsr f Fig. 1 is a fragmentaryfront elevation ofa` 2o o shearing machinehaving applied thereto a work holding` orstripping mechanism embodyingthis invention.

` Fig. 2 is a fragmentary longitudinal central l sectional elevationthereoi,on` line 2--2, Fig. 1.. 25 Figs. 3 and 4arerespectivelyfragmentary sectionalplan views thereof, taken on lines3-3 and 4--4 respectively, Fig. 2. i l

Fig. 5is a `fragmentary front elevation thereof i similar to Fig. 1, butshowing the partsof the 30 `mechanism in difl'erent positions.

6 `is a sectional view of a control valve `which maytbe used inconnection with my improved mechanism.: u o

Fig. "luisa diagrammatic view of the iluid pres-` `rating my improvedholding or stripping mechanism;` While I haveshown my improved holdingor stripping` mechanism` applied to a shearingor cutting machine of thetypecommonly referred c 40 to as a, "billet shear, ,it 4will beunderstood that the shearing machine used is shownmerely for thepurposeof illustrating one application of my improved stripping mechanism, and`it willube understoodthat `the samemay be used in con- 45` nection withshearing or cutting fmachines o1 other kinds. l u u `In the particularshearing machine illustrated,

1 the frame of the machine includes a pair oi' parallel plates spacedapart on which theva'rious 50 `parts "of the machine are mounted,` onlyone of these1 plates, namely, the `front `plateA being shown intheaccompanying drawings. The machine includesthe usual eccentric `shaftBhaving aneccentric `secured thereon and `arranged between the twoplatesjot the frame.l The ec- `posite sides of the stripper member I D.

`operate on` work oi?l different dimensions.

centric actuates avslfertically` movable plungerC, Fig.l2,` through the`medium of` an eccentric strap or ram D. also shown in` broken lines inFig. 1, the` ram `andyplungerbeing arranged between the two` platesofthe, frame. E represents the up-` 5 perfor movableknife which is mountedon the lower end of tthe plunger C. F represents the usual lower knifeseat to which` the lowerkniie o G is` secured,` see Fig; 2, the knifeseat .being seu cured to the front frame plate A and being sup- 10port'ed partly by thisf frame plate and partlyl by a knife supportingbracket or auxiliary frame H, as clearly shown in Fig. 2; i This bracketor auxiliary frame H isbolted or otherwise secured to u the front frameplate and thus forms a partlof 1x5 and reinforces `the frame of themachine. `X

u represents the work which is to be cut, such for example.` as a `bar`ormbillet. i

. In accordance` with this invention, I provide a holdingfor strippingmember or block` Illwhich is slidably` mounted in an upper` extension orportion` of the lower knife holder or auxiliary frame .Hr This part ofthe bracket or frame member `I-I is provided with a pair ofupright guiderailsorbars Il arranged to engage the op- I2 represents al pair of guidestrips or plates which may `be bolted or. otherwise secured to the frontedges ofthe guidemembers Ii` andl engaging with :the front face `of theAstripper member I0 30 at the edge; portions thereof. By means of thisconstruction, it will beevident that the stripper may` reciprocatebetween the two `guide portions li engaging the sides thereof andbetween the guide plates I2 and frame H engaging respective- 35 ,ly` thefront and rear faces thereof, Illa represents a hardened wearplate"removably secured to the lower `face of the stripper member I0 inyposition to` engage the work. Other means for mounting the` strippermember for reciprocatory 40 movement on the machine may be employed,iftdesired.` It will be noted that the lower portion `ofxthe auxiliaryframe` in part supportsvthe lowerknife, so that the` auxiliary framecarries the. load` resulting` from the `pressure of the stripperlagainst the lower knife. l `The stripper may be formed of a singiepiece,or, if desiredit may COmprise two parts adjustably secured together toadapt the machine to particular construction shown, the lower strippermember or part i0 is adjustably` secured .to an upper member or` part inthe form of a recip- `rocatory block 20, which is also arranged to move"vertically inthe same guides provided for the "55 ID. the

stripper i0. Any suitable or deslred'meansmay be employed for providingan adjustable connection between these two parts-of the stripper, and inthe construction shown by way of example, a screw 2| is employed forthis purpose Lwhich has a threaded portion engaging in a correspondinglythreaded hole extending downwardly into the stripper member Il).l This,adjusting screw also has ahead or part v22 whichis ar1 ranged-in a slotlin the reciprocatory blocku28 in such a manner that the screw ymay beturnedv relatively to this block but is' held against endw wise movementrelatvely to" the block.r The screw may be provided in the space betweenthe block 20 and the-lower stripper member I8 with an annular outwardlyextending portion or flangek 24 by means of which the screw 20 can beturned.- This outwardly extending part 24, in the construction shown, isprovided with holes spaced in the periphery thereof with which awrench/or other toolmay` engageifor turning the screw 28.

25 represents a lock nut arranged on\the screw'y 28 for the purpose oflocking the screwin adjusted position It will be understood that sincethe movementY imparted to the stripperv toward and from the work islimited," this adjustment is desirablefor enabling the' stripper toengage v the work, regardless of the transverse dimension vgroove formedin to the 1eft into the position shown in rig. 5,

or thickness of the work which is upon by the machine.` l

The movement of the reciprocatory'blockor upper part 28 voi vthestripper and thelower being operated v stripper member I0 toward andfrom the work is,

in accordance with this invention, accomplished lby means of a wedge 28movablebetwecn the up`"` per stripper member28 and a fixed part o! "themachine.v In the particular construction shown for this purpose, thewedge 28 is provided with an. inclined lower face engaging acorrespondingly inclined upper face of the reciprocatory block 28. Theupper part of the Wedge 28 is slidably mounted on a stationarywedgeguide v member, which, in the construction shown, is formed by anenlarged 'upper portion 38 ot the bracket or'frame member H which alsoin part supports the knife seat F and! the work X. In the particularconstruction shown. the upper part of the wedge 28 is provided with apair o! outwardly extending iianges 3l at opposite Sides thereof, seeparticularly Fig. 2.and this part o! the wedge fits intol acorrespondingly shaped the wedse guide member lli.` When the Wedge 28 isin' the position Shown in Fig. 1, the stripper is raised out ofengagement with the workx, and when the wedge is mozzo' v .o stripperwill be in engagement with tho Work 01 holding the same whlle'themovable kniio E makes the cut. l i

Any suitable or dired means may be providcd' for moving the stripperinto its upper position in which the bloclc bears against the:V inclined,-face of the wedge. In the particular construction example, I provide acylinder` 35, which is I' stripper.

mounted on the guide member 38 and which has la piston connected with'apiston rod 28,' the youter end of which is secured to aforwardly'extcnding projection 31 formed on the block 28 of the Fluidunder pressure, such for example as ain-isconducted to the lower part ofthe cylinder by means of a pipe I8 connected carcasse with vasupply-pipe 89 for fluid under pressure. Consequently, the pressure ofthe fluid will continually and yieldingly Aurge the piston in thecylinder 38 upwardly, and thus urge the reciprocatory block 28 intoengagement with the wedge 28.k The upper part of the cylinder 35 abovethe piston is preferably open to the air, for example, .by means of avent pipe 48. By means of this arrangement, the stripper I0 will beyieldingly held inits upper or inoperative position. If, however, theWedge 28 is moved to the left in Fig. i, Athe stripper will be moveddownwardly against theiair pressure `acting in the cylinder 35. Any

other means for maintaining the block 20 of the mechanism, including acyinder 44 having a piston 4 5 provided with a piston rod 46 -which issuitably connected with the wedge 28. A supply pipe or duct 41 carriesuid Vunder pressure to the head of the cylinder 44 for moving the pistonand wedge to the right into the position shown in Fig. 1, andlanother'iiuid supply pipe 48 conducts fluid under pressure to theopposite end o1' the cylinder 44 for moving thepiston 45 Yand the wedge28,1;0 the left into their operative positions shown in Fig. 5. It willbe noted that the piston rod 46 isrof relatively large diameter so thatfluid pressure entering the cylinder through the pipe 48 for moving, thewedge,v 28y into its operative position, will` act. upon a relativelywedge 28 by means of a fluid pressure controlled i cut. there will beamplcpoweravailable to move the wedge 28 to the right torelease thework.

I preferably also provide means for yieldingly stopping the movement ofthe wedge 28, in order to preventthe'movement of the piston 45 to therightln Figs. 1, 3 and 5 from damaging the piston 45 or its cylinder 44.In the particular conn struction shown for this purpose, I provide anoutwardly extending arm or bracket 50 which may be suitably Supported ona rigid part of the machine, and; which extends into operative rela.-tion to the end of the wedge 28. I preferably provide yielding meansfork stopping the movement ot the wedge 28. In the particularconstruction shown lfor this purpose, I have provided in the right handend of the wedge in Figs. 1,y 3 and 5 im aperture or hole containing oneor more rubber disks or pads 5|, and astud 52 is arranged l to engagethese pads to stop the movement `of the wedge. The stud 52in theconstruction shown is secured to the outwardly extending arm preferablyby means of a threaded engagement with an aperture in the projection 58,so that the stud 52 may be adjusted as may be desired, and a lock nut 58may be provided to hold the stud in the desired position. Consequently,when the.,

` *able knife.` t Any "suitable or desired] means may l t L to limitthis invention to the particular automatic eings; "o l l l f Theautomatic arrangement shown is actu--` ated by means of a cammember 55,which isl l suitably secured `on the main `or eccentric shaft` be:employed for this purpose, "and Ihave i1lus` trated by way! of examplea construction whereby this automatic actuation maybe accomplished by@means of fluid pressure,` such', for example, as compressed air. Thisautomatic operating mech` anism "is illustrated diagrammatically in Fig."l,

andis `also partially illustratedlin Fig.` 1. It will beunderstood,however, that itis not intended mechanism or arrangement shown in thedraw-v `113.01?- theshearing machineg During eachrotation of `the shaftB; thecam member 55 act'ates" `the stems" of` twovalves 56 Aand 51whlchextend o `into the path of rotary movement ofthe cam,` the o o o Vo y valves` being secured onyayiixed.partofthema-d chine."l Since thesevalves 'are of wellknown construction. they arenotherein shown in deltail, and it is sucient to say that they serve .to` discharge compressedair containedin the valve housings when the stems ot the valves arepressed inwardly by means` of the cam 55. The valve `56 o isfconnectedbymeansxof a pipei` leading to a manually operable valvefll, and then bymeans `of another` pipe 6I to one side of a clutch con`V ltrol valvehaving a housing S2. IConsequentlm` when `the plunger of the valve 156`is pressed int wardly, airor other sourd win be aischargeaout. ``of thepipes 59`and Sellandgout of the right hand end of the. control valvehousing 62. The other valve `51 is connected by means of a pipe or `ductl `64 to a stripper control valve having ahousing i o B5, andconsemently,` when thev stem of thevalve v has albranch pipe U0connecting with the left 51` is pressed inwardly, air is discharged "outof o lgthepipe s4 and outgof the right hand end ofthe strippercontroltvalve housing G5.`

The controlvalves inthe housings 62 and V65` `may be identical, `ando`fany suitable or desired construction, those shown being of `a well knownt type and of themselves do not constitute apart o oftthis invention.'Only one of these valves `is illustrated in Fig. .6, namely, the valve65, which containsta` reciprocatory `piston or plungerlglll,`

i which acts asaslidevalve, and is movable end# wise in the housingofthe `valve and held against rotation therein. `Aviror other fluidis`:` admitted L into .the upper portion of thevawe housing as by `mesmeof an inlet pipe connected with the fiuid supply pipe `39. The housingis lalso provided `with two ports; one of which `isconnected by means oftheplpell to `theheacl end ofthe oyll inderll, and the other portislconnectedby means of the pipe 48.` to the other'end offthe lcyun'deru.` Asvindicated by broken lines inrig.

6, the slidable valve member 10 therein has passages extending throughit which, when the slide "'valve 110 is located at the left as shown inFig. `6,

`zpermit `air to pass fromthe supply pipe 39 to,` the pipe 4] `to thehead of the cylinder Il and l `air from the other end ofxthecyllnderwill `be dischargedlthrough thepipe 48 to a discharge port `Il`formed inthe valve housingSS. `Vifhen the slide valve member moves tothe right. in

Fig.; 6, air underpressure from the inlet pipes will` pass1 tothe pipeAt: and thev air" frommthe :o 2,298,884 may, of

ing position'shown in Fig; 1.

head `end of the cylinder 44 `willbe discharged throughpipe Tand throughan air vent port 12 o member 10 to the right `in Fig. 6, to move theWedge 28 jinto `position to engage the stripper with the work, airisdischarged from the pipe 14 leading into the right sideof theyalvehousing r 65. This pipe 14 is connected through pipes 15 and l'18 to"afootvalve `11 of usual construction `which maybe depressed by theoperator `to permit` air to be discharged from the pipes '16,15

andl14 and from the right hand end of the `valve housing 65. Thereduction in air pressure `at the right end of the valvehousing,together `with the admission of compressed air tothe opposite side theslide member 10 tomove to the right.` This bleeder passage is connectedthrough small holes or passages with the compressed fluid passages inthe slide valve 1U. Another pipe 64 connects with theotherend ofthestripper control valve housing 65, `and with thel stripper release valve51, so thatjwhen the cam55 engages the stripper release` valve, `whichoccurs simultaneously with the beginning of the movement of the movabley `knife E `.toward the lower end` of its` stroke, zthe slidevalvemember 10 will be `movedgto the left into the `position shown inFig.` 6 to admit air to the head end of the cylinder 44, and thus movethe wedge intostripper releasing DOsition. This occurs imuch morerapidly than the downward movement of the knife, so that the work willbe engagesthework. o l

o The-pipe 16 connecting with the foot valve 11 :side of theothercontrol valve '62, and consequently. by depressing the foot va1ve`11,the operator also causes the control valve 62 to actuate theclutch ofthemachine bymeans of a clutch cylinder 8|; Fig. 7,"which causes theoperation of the shearingmachine. fThis operation is continued until thecam 55 actuates the uppervalve 56. `so thatair is dischargedfromthepipes 69 and E I andirom the right hand end of thetclutch "controlvalve 62. This causes the clutchf tobe disengaged; thus stoppingtheknife` :E at o or near its upper position.

The handcontrolled valve 60 serves the pur-` pose" of enabling theshearing machine to` `op-` eratev continuously or at `the `control `ofthe .op-1

erator through the medium of the foot valve 11. When theavalve is inthepostion shown in Fig. 7, with the handle `82 `thereof in the uprightposition, the `machinelis operated under the control of the operatorthrough the foot valve 11, coming to a stop` after eachrevolution of theshaft B.

. If the handle `82 is turned to the right, as indicated by thearrow`,.and\into the dotted line position showntin Fig. '1, the machinewill op-` erate continuously. In thatcase, air will be cut off from thelpipe 6I so that the clutch control valveGZ` remains `continuously in aposition to keep "the clutch in engaging position to operate themachine.` The stripper mechanism will then `be operatedin such a mannerthat when `the `cam 55 actuates the valve `56, the stripper will be "lof the slide `valve through a bleeder passage 18 extendingthrough theslide valver10 will cause held by thets'tripper before the movableknifef40 K air lwill be exhausted from the pipe 59 and through the valve60 from a pipe 84 connecting with the l pipe 14 lead-ing to the righthand end of the control valve housing 65. yThe releasing of the strippermechanism will be actuated las heretofore de scribed through the mediumof the valve Al'a'l.

The construction of the stripper vand its actuf ating -wedge iscomparatively simple and is very effective and reliable in operation.'Ihe angle of the= inclined face of the wedge to the direction ofmovement of the wedge is made small enough so that ample power isprovided for securely clamping the workl while being cut and the yangle;can also be made small enough so that the wedge cannot be moved out ofits operative position lby upward pressure` exerted on the stripper`bythe work. v Y

The making of thestripper in two parts adjustable relatively to eachother makes it possible to employ a small'angled wedge, since byadjusting the lower fpartf l0 ofthe stripper` relatively to the work, arelativelyfsmall movement of the stripper is sufficientl to effect theclamping of the work. The adjusting means for the stripper member makesthe machine quickly and easily adaptable for operating on work of anythickness within'the 'capacity of the machine,` with a comparativelysmall movementy of the stripper by the` wedge. This small movement ofthe stripper enables'the wedge to exert a powerful very 'securely duringthe cutting operation, with the minimum of power acting on the wedge.v

`I' claim as'my invention:

1. In a shearing machine having a stationary knife and a movable knife,the combination of a stripping mechanism for confining the work in thedesired relation to said stationary knife, and including a strippermember movable toward and from the work, a wedgewhich is movable trans,-verselyof the direction of movement of said stripper member andwhich-when moving in one direction, 'imparts movement to said strippermember in adirection to move said stripper member toward the work, andmeans for moving said stripper member away from the work when said lwedge moves in theopposite direction.

, ing a stripper member movable ltoward and from the work, means foryieldingly urging said stripper member in a directionl away from thework, and a wedge movable Itransversely of the direction of movement ofsaid stripper' member for imparting movement to said stripper member ina direction to move thesame against said yielding'means toward the work.

3. Inra shearing machine having a stationary knife and a movable knife,the combination of a stripping mechanism for holding the work in thedesired relation to said lowery knife,l and including a stripper membermovable toward and from the work, and a wedge movable transversely ofthe direction of movement of said stripper member and having an upperfacer engaging a fixed part of said shearing machine and a lower` faceengaging said stripper member for moving the same toward the work, andmeans for moving said stripper member away from the work when said wedgemember is moved in a direction to engage- .stripping mechanismforconfining the work in the desired relation to said stationary knife, andincluding a stripper member movable toward and from the work, a wedgemovable transversely of the direction of movement of saidstripper'member and imparting movement theretol in a direction to movesaid strippermember into confining relation to the work,'power operatedmeans connected with said wedge for moving the same to position saidstripper member into and out of its work confining position, and meansfor yieldingly urging said stripper member away from the work.

y5.In, a shearing machine having a stationary knife and a movable knife,thecombination f `a stripping mechanism for holding the work inthedesired relation to said stationary knife, and

including a stripper member movable toward and from the Work, a wedgemovable transversely of the direction of movement of said strippermember and imparting movement thereto in a direction to move saidstripper member toward the work, a cylinder having a piston connectedwith said wedge, and means for supplying fluid under pressure to saidcylinder at either side of saidr piston to move said wedge in eitherdirection to move said stripper toward and from the Work.

6. In a shearing machine having a stationary knife and a movable knife,the combination of a stripper for confining the work in the desiredrelation, to said stationary knife and including two parts movabletogether toward and from the work, means for adjusting said parts towardand from each other to adapt the stripper for operaknife and 'a movableknife, thecombination of a stripper for holding the work in the desiredrelation to said stationary knife and including two parts movable towardand from the work, a wedge movably arranged to impart movement to one ofthe parts of said stripper in a direction to move said stripper towardthe work, and a screw connecting said parts of said stripper for holdingsaid stripper parts in different spaced relations to each other toenable the stripper to cooperate with work of different thicknesses.

'y 8. In a shearingnachine havingr a frame, and a stationary and amovable knife arranged on said frame, the combination of a strippingmech,

anism including an auxiliary frame having a part supporting said-fixedknife, a movable stripper arranged in said auxiliary frame and movabletoward and from the work, a wedge for moving said stripper intogrippingengagement with the Work, and a wedge guide part formed on saidauxiliary frame, said wedge being movable with one face thereof engagingsaid wedge guide part and the other face thereof engaging said stripper9. In a shearing machine having a frame, and a stationary and a movableknife arranged on said frame, the combination of a stripping mechanismincluding an auxiliary frame having a part supporting said `fixed knife,a movable .stripper arranged in said auxiliary frame and movable towardand from the work, a wedge for moving said stripper into grippingengagement withthe i work, a `wedge guidelpart formed on saidauxiliarystripping mechanism for holding the work in the i y 10. In afshearingmachnehaving a stationary knife and a movable knife, `the combination ofal t stripping mechanism for holding the `work in the i desired relationto said stationary knife, and includinga stripper member movable towardand from the work, avwedge which is movable to actuate said strippermemberfor moving the same `toward 'the work, a fiuid operated cylinderarranged on the stationary part of said machine and having a pistonconnected withsaid stripper member, andimeans for admitting uid `under ipressure to said cylinder to yieldingly urge said y piston in adirection to move said strippermem-- ber out of engagementwith the work.

11. In a shearing machine having a stationary knife and a movable knife,the combination of a desired relation to said stationary knife,andincluding a stripper member ,movabletoward `and from the work, awedge operatively connected with said stripper member `to move `thesamei toward the work whenisaid wedge is moved in one direction andfor-releasing pressure of the strip-` i per against the work when thewedge is moved in" s 'the reverse direction,` `iiuid pressure actuated imeans for imparting movement tosaid wedge in i either direction, andcushioning means for stop-f ping movement of said Wedge toward the endVof Y `its movement to releasesaid stripper.

`12. `Int a shearing machine having a stationary knife andamovableknife, the combination of a i stripping mechanisml for holdingrthe work in desired relation t o said stationary knife, and including `astrippermember movable toward and i from the work, a wedge operativelyconnected with said stripper member to move the same toward the Workwhen said wedge is moved in one direction and for releasing pressure ofthe strip--` per against the Work when thewedge is moved in the ,reversen direction, i fluid pressureV actuated means for imparting` movement tosaidwedge in eitherdirectionya cushioning member carried by said wedge,a member arranged on affixed part oi i said machine for engaging saidcushioning means, and means for adjusting` said lastw mentionedmemberrelativelyto said iixed. part of said machine for stoppingmovement of said Wedge` eramm` HQ erom.

